US1254501A

US1254501A - Type-writing machine.

Info

Publication number: US1254501A
Application number: US612715A
Authority: US
Inventors: Hubert K Henry
Original assignee: REX TYPEWRITER Co
Current assignee: REX TYPEWRITER Co
Priority date: 1915-02-04
Filing date: 1915-02-04
Publication date: 1918-01-22
Anticipated expiration: 1935-01-22

Description

H. K. HENRY. TYPE WRITING MACHINE.

APPLICATION FILED FEB. 4.1915.

Patented Jan. 22, 1918.

7 SHEETS-SHEET I.

H. K. HENRY.

TYPE WRITING MACHINE. APPLICATION FILED FEB. 4v 1915.

Patented Jan. 22, 1918.

FSHEETS-SHEET 2- H. K. HENRY.

TYPE WRITING MACHINE.

APPLICATION HLED FEB. 4. I915.

Patented Jan.22,1918.

7 SHEETS-SHEET 3.

H. K. HENRY.

TYPE WRITING MACHINE.

APPLICATION FILED FEB. 4. 1915.

Patented Jan. 22, 1918-.

7 SHEETSSHEET 4.

H. K. HENRY.

TYPE WRITING MACHINE.

APPLICATION FILED FEB. 4. 1915.

h) Inc/awry Q g g; MOM/f 5. ,2? gate/c, Ma

Q\ 9% E u; 1 Ru L Nu m Q \R @N R M m s QNK K. 5 HQ m" RN\ \WNN m \Q NQ %N\ NQ 9Q MMV x Q w H. K. HENRY.

TYPE WRITING MACHINE.

APPLICATION men FEB. 4. 1915.

Patented Jan. 22, 1918.

7 SHEETS-SHEET 6.

H. K. HENRY.

TYPE WRITING MACHINE.

APPLICATION FILED FEB. 4. I915.

HUBERT K. HENRY, OF CHICAGO, ILLINOIS, ASSIGNOR TO REX TYPEWRITJER COMP OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

Specificationof Letters JPatent. Pmmnt gfl Jam 22, 1911 Application filed February 4, 1915. Serial No. 6,127.

To all whom it may concern:

Be it known that l, HUBERT K. HENRY,

a citizen of the United States, and a resident section. Fig. 6 is ,jap igverted' plan view.

tion.

of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Type-Writing Machines, of which thefollowing is a full, clear. andexact description.

The invention'relates to typewriting machines and seeks to provide an improved typewriter of simple, economical construc- A further object of the invention is to provide a typewriter construction which, for the most part, can be economically formed of sheet metal. The invention consists in the features of improvement hereinafter set forth, illustrated in the preferred form in the accompanying drawings and more particularly pointed out in the appended claims.

In the drawings, Figure 1 is a vertical,

' longitudinal section on line 1-1 of Fig. 5.

Fig. 2 is a detailed vertical section of parts shown in Fig. 1. Fig. 3 is a view similar to Fig. 1, with the carriage and one of the type bars and key levers shown in shifted position and with certain parts omitted for the sake of clearness. Fig. 4 is a detailed vertical section of parts of the carriage-shift mechanism. Fig. 5 is a rear elevation of the machine with the back plate removed and a portion of the carriage bed shown in of the carriage mechanism with portions of the machine shown in section on the line 6-6 of Fig; 1. Figs. 7 and 8 are vertical. sections of the carriage mechanism taken respectively on

lines

77 and 88 of Fig. 1. Figs. 9 and 10 are detailed sections on the lines 99 and 10-10 respectively of Fig. 7. Fig. 11 is an end view of the platen with the platen shaft shown in section on the line 1111 of Fig. 8. Figs. 12 and13 are detailed cross-sections on the lines 1212 and 13-13 respectively of Fig. 1, and illustrating the type-bar mechanism, parts being omitted for the sake of clearness. Fig. 14 is a detailed section. on an enlarged scale, of the bearing portion of one of the key levers. .Fig. 15 is a plan view of the carriage mechanism. Fig. 16 is a cross-section on the line 1616 of Fig. 15. Fig. 17 is a detailed view in front elevation of the typebar guide and ribbon shifter.

The frame of the machine comprises a pair of side plates 10, preferably formed of sheet steel and having inclined frontportions, as most clearly shown in Figs. 1 and 3. At the lower, front and rear portions of the machine the side plates 10 are connected by transverse bars or

plates

11 and 12, which are suitably secured at their ends to the side plates. In the form shown, the lower rear corners of the side plates and the ends of the transverse bar 12 are secured by screws to corner blocks 13. The front transverse connection 11 is preferably in the form of an angle bar having an inturned flange 14 at its upper edge, and being provided at its ends with inturned lugs 15 that are fastened by screws, rivets or the like to'the lower front end portions of the side plates. Intermediate the front and rear portions of the machine, but nearer the rear thereof, the side plates 10 are connected by a transverse, vertically disposed type bar support or segment 16 which is preferably formed of cast metal, and to the ends of which side plates are fastened by screws 17 (see Figs. 5 and 13). The side plates are also connected at the upper front portion of the machine by a transverse vertically disposed plate 18 hav-' ing flanged end portions 19 that are fastened by screws, rivets or the like'to the side plates (see Figs. 1 and 12). The central portion of the transverse front plate 18 is depressed and curved, as most clearly shown in Fig. 12, and is provided with an inturned flange 20. Preferably also a top form an opening through which the ty e bars are projected to strike the platen. e rear portion of the machineis preferably inclosed by a plate 22 having an inturned flange 23 at its upper edge, and which is removably connected by screws or the like to the lower corner blocks 13 and to the upper corner blocks 24, the latter being secured to the upper rear ortions of the side plates 10. The parts of t e frame described, 1

ally mounted upon the upper front portion of-the transverse support or segment 16, and normally extend forwardly therethrough in horizontal position, with the type 26 at their forward ends engaging the segmental rest or support 27 (see Figs. 1, 12 and 13). In the preferred construction shown the type-bar support 16 is provided at its upper front curved portion with a forwardly projecting part or flange 28 having a plurality of guide slots 29 formed therein, one for each of the type bars. These slots are, of course, radial with respect to the printing point of the machine and preferably the slots 29 are closely adjacent at the center of the type bar segment and farther apart at the ends thereof, as most clearly shown in Fig. 13. On its under side,'the projecting flange or segment 28 is provided with a seat for a pivot rod 30, which extends through the ends of all of the type bars. Pins 31 projecting from the face of the support 16 extend beneath and engage the ends of the pivot rod 30 and secure it in place.

The type bar rest 27 is formed of astrip of leather, felt or like cushioning material, the ends of which are connected by screws and

washers

32 and 33 to the under side of the top plate 21 (see Figs. 6 and 12). The central portion of the leather strip is provided with 3. depending tab 34 which is connected by a screw 35 to the front plate 18.

Preferably, in order to maintain theleather strip of proper form, it is provided with a stiffening or backing. This stiffening or backing is preferably in the form of a segmental metal strip 36, which is secured to the flexible strip 27 by a number of rivets 37. The metal strip, however, is not directly connected in any way to the metal frame of the machine and the rest is of such a construction that it absorbs the momentum of the type bars as they return to normal position. and prevents them rebounding.

The key levers 38 are arranged in horizontal position beneath the type bars and the up-turned'forward ends thereof are provided with keys 39 arranged in three banks, to form a keyboard of the universaltype. The key levers are mounted midway between their ends upon a series of three pivot rods 40, the key levers of each bank being mounted upon one of the pivot rods. The latter are supported at their ends in the side plates 10, and, in the form shown, are in horizontalalinement above the key levers. Each of the key levers is provided with an upwardly projecting lug 41 having a bearing sleeve 42 which encircles the corresponding pivot rod 40. The ends of the bearing sleeves abut (see Fig. 12) to hold the type bars in proper spaced relation. The bearing sleeves are preferably formed of, short pieces of sheet metal tubing which are upset or crimped in suitable dies to form flanges 43 (see Fig. 14) which snugly engage the opposite faces of the lugs 41 and thereby securely fasten the key levers to the bearing sleeves.

The forward portions of the key levers extend beneath the front transverse plate 18 and the rear ends of the key levers are arranged beneath and slightly in front of the rear pivot ends of the type bars and are connected thereto by a series of upwardly extending link 44. The set of type bars are narrower than the set of key levers and the rear ends of the outermost key levers are preferably bent inwardly to a slight extent, and the outermost links 44 are also inwardly offset, as shown in Fig. 13. The upper ends of the links are pivotally engaged with lugs 45 on the type bars 26. In the normal position of the type bars, the pivotal connection between the bars and links is below and in front of the type bar pivot. The printing point of them-achine is vertically above the type bar pivot (see Fig. 3), and in striking position the type bar is vertically disposed with the pivot point between it and the link above and in front of the type bar pivot.

The type bars and key levers are adapted to return by gravity to normal position, with the ends of the type bars in engagement with the rest 27, but preferably also light springs are employed which aid in returning the parts of the type bar mechanism to normal position. In the construction shown, li ht springs 46 are coiled about the bearing sleeves 42 with one end of each spring in engagement with the lug 41 of the key lever. The other end of each spring is extended downwardly and engages a transverse angle bar 47 which extends between and is connected at its ends to the side plates 10.

The type heads 26 carry three sets of type, and the platen and its supporting ca 1'- riage shift vertically to bring any one set of type into operation. For this purpose the carriage is mounted upon a vertically shifting frame, which comprises a transverse carriage bed or track 48 mounted upon the upper ends of a pair of uprights 49. The

uprights 49 are in the form of flat bars of sheet steel having T-heads 50 at their upper ends, which extend from front to rear of the machine and are provided with inturned flanges 51. The carriage bed or track 48 is secured to the rear portions of the flanges 51 on opposite sides of the machine and the forward ends of these flanges are extended upwardly and then rearwardly to form supports 52 for the ribbon spools. The uprights 49 are arranged adjacent the inner faces of the side plates 10 and immediately in front of the type bar support 16, and their upper ends are held between bearing pieces 53 fixed to the support 16 and guides 54. The latter are adjustably seof the shifting frame.

cured to the side plates 10 byscrews 55, which extend through slots in the guide pieces, and the guide pieces are provided with inturned rear ends which engage the forward edgesof the uprights 49 and hold the shifting frame against play in a fofeand-aft direction. A pair of guide shoes rock arms 58, which are securely fastened at their forward ends to'a transverse rock shaft 59, which is journaled in suitable bear ings in side'plates 10; The rock arm 58 at the lefthandside of the machine is provided with a forwardly extending arm 60, the upturned front end of which is provided with a key 61. A short lever 62 having a key 63 at its forward end is pivoted-to the front upturned end of the arm 60. The short lever 62, adjacent its rear pivoted end, is provided with a depending arm 64 and a spring 65 interposed between the arm 60 and this arm normally holds the latter against an inturned stop 66 on the forward end of the arm 60. The lever '62 and its arm 64 are arranged to coeperate with a pair of stops to limit the vertlcal movement One of these stops is in the form of a screw 67 adjustably mounted in one end of the cross bar 11. The other stop 68 comprises a lug formed upon a plate 69 fastened to the inner face of the adjacent side plate 10.

The weight of the sifting frame and parts carried thereby normally hold it in its lowermost position, as shown in Figs. 1,5 and 7. In this position two stop pieces 70 fixed to the heads 50 of the'upr'ights 49, rest upon the upper edges of the side plates 10 (see Figs. 5 and 7), and, when the type bars are actuated the lower case type thereon will be brought to the printing point. For writing caps, the finger key 63 is depressed. The depression of this key first shifts the lever.62 about its pivot and into engagement with the lug 66 on the arm 60 so that the further depression of the key rocks the shaft 59 and the arms 58. and thus the shifting frame and carriage mechanism and the carriage supported thereby. This shifting movement is limited by the engagement of an out-turned lug on the lower end of the arm 64 with the stop lug 68, as shown in Fig. 4. For writing figs the key 61 is depressedas shown in Fig. 3. When this is done, the lug on the arm 64 clears the stop lug 68 and the vertical movement of the carriage is not arrested until the lever 62 engages the stop screw 67. In this way the

keys

61 and 63 shift the carriage to different heights for printing figs and ca-PS3,.

The weight of the shifting frame and parts carried thereby is partially counterbalanced by a pair of springs 71 (see Figs. 1 and 5) which are connected at their upper ends to the upper portions of the support 16, and, at their lower ends, to the rear crossbar 57 of the rocking frame. A locking lever 72 (see Figs. 1 and 3) is pivotally mounted on one end of the front transverse bar or plate '18, and its lower end is nor mally on one side of the arm or key lever 60. When the latter is depressed to its lowermost position as shown in Fig. 3, the locking lever 72 can be shifted to bring its lower end above the arm or key lever 60 and thereby lopk the carriage and platen in the extreme shifted position. When the arm or key lever 60 is in the position shown in Fig. 4, to hold the platen in position for writing caps, the locking lever 72 can be shifted, if desired, to bring a shoulder 73 on its lower end over the upper edge of the lever 60.

The carriage track or'bed 48, in the form shown, is formed of pressed sheet steel, and is provided at'its front and rear edges with -up-turned inwardly inclined flanges 74.

The frame of'the carriage is also formed of pressed sheet steel and comprises a transverse bar 75 having down-turned. inwardly inclined flanges 76 at its front and rear edges and upturned end pieces 77 which support the platen. The carriage fits within the bed or track 48 with its front and rear edges engagi the upper portion of the guide flanges 4 and with the lower edges of the flanges 76 resting upon the horizontal por tion of the bed or track. The carriage is propelled in letter-space direction by a spring drum. This spring drum (see Figs. 6, 7 and 10) is mounted in a U- shaped bracket 78 which is formed of pressed steel and is secured to the under face of the carriage bed 48. A hub'79 is clamped and held against movement between the side members of the bracket 78 by means of a bolt 80 extending therethrough. This hub comprises an enlarged central portion and reduced end portions. The body of the drum is formed of a ring 81 and heads or disks 82. The heads or disks 82 have a snug. clamping fit with the ring 81 and are forced under pressure into the ring. The central openings of the disks loosely and rotatahlv fit the reduced end portions of the hub 79 and a coiled spring 83 within the drum is connected at its ends to the enlarged central portion of the hub 79 and to the ring 81. The upper end of the drum projects through an opening in the carriage bed 48 and a steel strap 84 coiled about the drum and connected thereto at one end, extends over the carriage bed and is connected at its opposite end by a hook 85 (see Fig. 7) to the righthand end of the carriage.

The escapement which controls the letterspace movement of the carriage is mounted upon the shifting frame to move vertically therewith. For this purpose a U-shaped bracket 86 is fixed to the under face of the carriage bed48 and at the rear central portion thereof (see .Figs. 1, 5, 6 and 7). This bracket is provided with down-turned ears and also with an upwardly and rearwardly projecting portion 87 having at its upper end, an inwardly offset stop lug 88. A U- shaped frame 89 is connected with the bracket 86 by a horizontal pivot pin 90 and is provided with forwardly extending arms 91 which support the pivoted dpg rocker. A U-shaped arm 92 (see Fig. 1) 1s fixed to the frame 89 and extends upwardly therefrom through an opening in the bracket 86. Aspring 93 coiled about the pin 90 engages one of the arms 91 and holds the bracket and parts carried thereby in normal position.

- In this position the arm 92 engages an adjustable screw 94 on the upright 87.

The dog rocker 95, like the other parts of the escapement, is preferably formed of sheet metal and is T-shape in outline, as most clearly shown in Fig. 7. The horizontal arms 96 at the upper end of the dog rocker are provided at their ends with pivots 97 which engage suitable bearing openings in the forward ends of the arms 91. A pair of

screws

98 and 99 are threaded through the, upper portion of the dog rocker, one above the other, as most clearly shown in Fig. 7. These screws are provided with shouldered forward ends and with threaded rear ends, the latter serving to secure a fixed dog 100 to the dog rocker. A spacing dog 101 is pivotally mounted upon the shouldered portion of the upper screw 98, with its lower end or tail arranged between the upper ends of a pair of

spring arms

102 and 103. .The lower ends of the

spring arms

102 and 103 are integrally connected and are fastened to the lower end of the dog rocker by a screw 104. The springs 102 and I 103 are adapted to bear upon the lower end or tail of the spacing dog 101 and also upon the shouldered front end of the screw 99.

The upper portion of the dog rocker and the dogs thereon extend through an opening in the carriage guide 48 into engagement with a rack bar 105 fixed to the underside of the horizontal carriage plate 75. The spacing dog 101 normally engages the rack I teeth and the tension of the spring drum holds the spacing dog in the position shown in Fig. 7, with the dog against a stop lug 106 on the upper end of the dog rocker and with the spring 102 under tension. When the lower end of the dog rocker is shifted rearwardly, as shown in Fig. 3, its upper portion is swung forwardly to move the spacin dog 101 out of engagement with the rack and the fixed dog 100 into engagement therewith. The spring 102 then swings the dog 101 about its pivot so that, when the dog rocker swings back, it will reenga e the next tooth of the rack 105 and permit the letter-space movement of the carriage. The shift of ,the spacing dog effected by the spring finger 102 is limited by the spring finger 103', but when the carriage is drawn back toward the right, the upper end of the spacing dog may be swung about its pivot toward the right against the tension of the spring 103. The spacing dog is also provided with a lug 107, which, while it permits the movements described of the spacing dog, cooperates with the lug 106 to prevent the displacement of the dog.

The lower end of the dog rocker is connected to an actuating shifter 108 by a screw 109. The latter extends through a vertically slotted part 110 of the shifter and through a forwardly turned lug on the lower end of the dog rocker. Also the rear portion of the shifter 108 is connected by a swinging link 111 to a lug 112 on the lower rear cross bar 12. The upper front portion of the shifter is connected by a pivot pin 113 to a coupling member 14, and the latter is adjustably connected by screws 115 to the central portion of a universal bar 116. The latter (see Figs. 1, 3. 5 and 13) is of segmental form and extends above the type bar segment in position to be struck by the type bars when the latter are actuated, as shown in Fig. 3. At points adjacent its ends the universal bar 116 is connected to the upper forwardly projecting ends of a pair of arms 117. Preferably the arms 117 and the universal bar 116 are formed of a single piece of pressed sheet steel. At their lower ends the arms 117 are fixed to a rock shaft 118, the reduced ends of which are journaled in suitable bearings 119, the latter being suitably mounted in the side plates 10. I A spring 120 (see Figs. 5 and 13) which is coiled about the rock shaft 118 engages one of the arms 117 and holds the universal bar and the actuating shifter 108 in normal position. In this position, a stop screw 121 adjustably threaded through a lug on the shifter 108 engages the rear face of the type bar support 116.

The universal bar and the shifter 108 are thus actuated by the key levers and type bars to actuate the dog rocker and effect the step-by-step movement of the carriage. The pin and slot connection between the dog rocker and actuating shifter 108, permit the vertical shift of the dog rocker with the carriage supporting frame. As is clear from Figs. 1 to 3, the link 111 serves to maintain space bar is lL-shaped is section and is conthe slotted portion 110 substantially vertical as the universal bar is rocked rearwardly so that the throw imparted to the dog rocker s substantially uniform in the difl'erent vertical ositions of the carria e shifting frame.

T e space bar 122 (see ig. 1) is also arranged to operate the dog rocker. This nected at its ends to a pair of levers 123. These levers extend rearwardly beneath the pivot rods 40 and are hung on the front pivot rod. The rear ends of the levers 123 are connected by an integral cross bar 124 which extends beneath the forward end of. an arm 125, the rear end of which is fixed to the rock shaft 118. The space bar is held in normal position with a stop lug 126 thereon extending beneath the flange 14 of the front cross bar 11. When the space bar is depressed, the bar 124 at the rear end of the lever arms 123 lifts the forward end of the arm 125 and rocks the shaft 118 and there by actuates the escapement. The arm 125 is bent upwardly as shown, so that it will not interfere with the vertical movement of the bar 57.

In the ordinary operation of the escapement, the dogrocker oscillates in the frame 89 and the latter is held stationary with the upwardly projecting arm 92 in engagement with the stop screw 94. I By shifting the upper end' of the arm 92 forwardly the frame 89 may be rocked on the pivot pin 90 to depress the arms 91 and the dog rocker carried thereby, and thus move theescapement dogs out of engagement with the carriage rack and permitthe free lateral movement of the carriage. For this purpose the U-shaped arm 92 is provided with an upwardly projecting portion 127 which extends behind and engages the rear face of a verti cally disposed transverse rock bar 128. This rock bar is provided at its ends with rearwardly turned lugs 129 which are fixed to a pivot rod 130 that extends between and is pivotally mounted in the end pieces 77 of the carriage. By rocking the-pivot rod 130,

the transverse plate or bar 128 is oscillated and the upper end of the arm 92 is shifted forwardly to release the escapement. It should be noted that the engaging portions of the arm127 and plate or bar 128 extend above and below the pivot rod 130 so that the engagement of these parts tends to hold the rock bar 128 and pivot rod 130 in central position, and, by oscillating these parts in either direction from normal central position, the end of the arm 92 may be moved in forward direction to release the escapement. For shifting the pivot rod or rock shaft in opposite directions, a finger-piece 131 is fixed to the righthand end thereof adjacent and preferably outside of the righthand end plate 77 of the carriage. The rock shaft 130 is pivoted in rearwardly project- Y eeann 136 are adjustably mounted on this stopbar and are arranged to cotiperate with the fixed stop lug 88 to limit the movements of the carriage in opposite direction. These margin stops are formed of sheet metal bent to extend about the stoprod, as most clearly shown in Fig. 1, and adjustably held in position on the stop rod by screws 137 or the like. The lefthand margin stop is provided with a depending lug 138. The righthand margin stop 135 is provided with a lug 139 and a swinging bell trip 140 which is pivoted at its upper end to the rear portion of the margin stop. As the carriage moves in letter-space direction, the part 140 will first engage a lug 150 on the upper end of a bell hammer 151. The latter is pivoted at its upper end to an arm 152 which is socured to and projects rearwardly from the carriage bed 48. A depending arm 153 formed in piece with the arm 152 carries a bell 154. After the trip 140 passes the lug 150 the bell hammer is released to sound the bell and notify the operator that the carriage is approaching the end of its movement. At the end of the letter-space move ment, the member 140 will engage the fixed stop lug 88 and will be moved against the lug 139 of the margin stop to positively arrest the carriage.

One or more tabulator stops 155 are also mounted upon the stop supporting rod 134. The tabulator stop is similar in its'con- .struction to the margin stops, exce t that it is not provided with a depending lug but has at its upper portion a rearwardly projecting lug 156. Normally this lug (see Fig. 1) will clear the stop lug 88, but if the finger-piece 131 at the righthand end of the shaft 130 is moved rearwardly, the .bar 134 and stops thereon will be lowered and the lug 156 of the tabulator stop will be inllne with the fixed stop 88. At the same time, bar or plate 128 will be shifted to effect the release and the carriage can then be moved until the tabulator stop engages the fixed stop. By shifting the upper end of the tinbar or more seats 157 formed in the upper edge of the stop bar 134 at letter-space dlstances a art.

A U-shaped bracket 158 isfixed to the front up-turned flange 74 of the carriage bed (see Figs. 1 and 6), and a U-shaped rocklng member 159 is plvotally connected to the bracket 158 by a horizontal plvot pm 160. The member 159 is provided with an upwardly projectingbifurcated type bar guide having forwardly projecting rongs 161 at its upper ends. It is also provided with a downwardly and rearwardly projecting arm 162 which is arranged to be engaged by an arm 163 that projects forwardly from the upper portion of the dog rocker. The parts are so arranged that, as the rocker is OSClllated, the upper portion of the rocking type guide will be shifted from its normal positlon shown in Fig. 1 to a position adjacent the printing oint as shown in ,Flg. 3. The rocking mem er 159 also serves as a ribbon shifter. For this purpose, a thin metal plate 164 is provided with integral retaining-clips 165 bent about the upright portions of the type bar guide and with vertical slots 166 through which the ribbon is passed. The ribbon holder, like the type bar guide, is bifurcated to provide a space through which the type are projected and across which the ribbon extends. Preferably, as shown, the ribbon holder can be adjusted vertically upon the rocking member to bring different portions of the ribbon (for example, diflerent colored bands) into the path of the type. The lower horizontal por tion of the rocking member and shoulders 167 on the upright portion thereof, limit the shift of the ribbon holder.

The ribbon is wound upon a pair of spools 168 (see Fig. 15) which are mounted on the upper ends of two short shafts 169. These shafts are journaled in the forward ends of the flange 51 of the carriage shaft frame and in the over-hanging portions 52 thereof. Preferably, as shown, the ribbon spools are arranged within cylindrical cases 170 fixed to parts 52 and provided with slots 171 through which the ribbon extends. The ribbon passes horizontally from one spool to the other and through the slots 166 of the oscillating ribbon-holder and shifter.

The spool shafts are provided on their lower ends with gears 172 (see Figs. 1 and 6) which mesh with intermediate idlers 173, ,the latter being mounted upon studs 173 that depend from the horizontal flange 51. The gears 173 are adapted to be alternately engaged by a pair of worms 174 on the opposite ends of a shaft 175. The latter is journaled in down-turned lugs 176 on the ends of 'a horizontal supporting bar 177. This bar is connected by a central pivot 178 to the under side of the carriage bed or track 48, and is adapted to be oscillated to engage one of the worms 174 with theadjacent gear 173 and disengage the other worm from its gear. The worms 174 are preferably formed by winding a length of wire around the ends of the shaft 175 and brazing or otherwise suitably securing the same thereto.

A projecting finger-piece 179 extends from the holder 177 This fingeriece extends through the opening of a -shaped bracket 180 on the shifting frame (see Fig. 1.), the upper portion of the latter having a depending lug 181 located midway between the ends of the bracket opening and serving to hold the finger-piece 179 at one end or the other of the opening in the bracket 180.

The central portion of the shaft 175 is! provided with a ratchet 182 which is arranged to be engaged by a pushing pawl 183 and a pulling pawl 184. These pawls arc pivoted upon a supporting lug or bracket 185 fixed to the dog rocker and are connected by a spring 186 which holds the dogs yieldingly into engagement with the ratchet 182. The vibration of the dog rocker thus rotates the shaft 175 in one direction,'and by shifting the shaft support 177 as described, the worms 174 can be alternately brought into engagement withthe gears 173 to feed the ribbon in opposite directions.

It should be noted that the ribbon feeding mechanism and the ribbon vibrator are both operated from the escapement dog rocker, and, like the latter, are mounted upon the carriage shift frame to move vertically therewith.

The carriage platen 187 comprises the usual rubber-covered wooden roller mounted upon a shaft 188, which is journaled in the end plates 77 of the carriage and provided wlth turning buttons 189. Sheet metal cap pieces 190 having inturned flanges 191 fit over the reduced ends of the platen and are provided with inturned integral prongs 192 for securing the same to the platen. They are also provided with hub portions 193, through which fastening pins 4 extend to fix the platen to the shaft 188. The flange of the cap piece at the lefthand end of the machine is provided with fine teeth and feed pawl 194 (see Fig. 16) cooperates therewith to effect alined space movements of the platen. This feed pawl is pivotally mounted upon the upper end of meteor jects inwardly from a part of the adjacent end plate 77 This spring holds the arm 195 in the normal position shown in Fig. 16v against a Stop 200. By pressing finger-piece 196 rearwardly, the dog 194 grips the teeth on the adjacent cap piece of the platen and rotates it in line-space direction. An adjustable screw 201 threaded through the flange on ledge 199 limits this forward movement of the line-spacing dog. The stop 200 is U-shaped in form (see Fig. 15) and is mounted upon a rod 202. It may be adjusted lengthwise on the rod and so moved into and out of line with the arm 195 to thereby variably limit the forward or idle movement of the arm 195 to correspondingly vary the spaces between the lines.

The rod 202 extends between and is fixed to upwardly and forwardly projecting ears 203 on the end plates 77. It is preferably square in section and the portions-of the stop 201 are provided with similar square openings. This rod also carries adjustable sleeves 205 having depending portions 206 provided with paper-guide fingers 207. 1nclined paper-table 208 is provided with rearwardly projecting lugs 209 pivo'tally engaging the shaft 180. The table is'provided with a curved lower portion which extends forwardly beneath the platen and carries a longitudinal feed roller 210 which projects through a slot in the forward edge of the paper-table or guide 208 into engagement with the platen. A pair of spring fingers 211 (see Fig. 8) are fixed to the under side of the carriage plate and are provided with bent ends which project upwardly through opening in the plate 75 into engagement with the paper-guide plate 208. These fingers serve to yieldingly hold the paper-guide plate in position with the feed roller 210 and the forward edge of the paper-guide in engagementwith the platen. A paper-guide 212 also projects up from the bracket 158. This is formed of spring metal and is yieldingly held in position with its upper edge closely adjacent the surface of the platen and in line with the printingpoint. the portion of the'guide opposite the printing point being slotted, of course, to permit the passage of the type. This guide thus acts as a gage for positioning the paper on the platen and in bringing any desired portion thereof to the printing oint.

A rack and a cooperating 0g are provided for spacing the carriage in backward direction. Preferably the back-spacing rack 213 (see Fig. 8) is mounted to slide longitudinally upon the upper face of the carriage support or guide 48. A pair of screws 21 extend through slots 215 in the rack and hold the latter in place while permitting a longitudinal movement of the rack slightly greater than one letter space. The rack shown is in the form of an angle bar, the

rack teeth being formed on the vertical flange thereof and the horizontal flange resting upon the upper face of the plate48; A spring 216 is connected to a projection on the rack through the fixed pin 178 and holds the rack in normal position with the right hand ends of the slots 215 engaging "the screws 214. An arm 2 17 is arranged beneath the left hand portion of the carriage plate 7 5 and has an up-turn'ed end 218 which extends upwardly adjacent the lefthand end plate 77. The part 218 has an ofiset perforated lug 219 (see Figs. 8 and 16) through which the platen shaft loosely extends. This arm 218 is normally inclined away from theend plate and the

parts

217 and 218 are adapted to hate a rocking movement on the corner of the carriage between the plate 75 thereon and the lefthand end plate 77, which rocking movement can be efiected by pressing the upper end of the arm or finger-piece 218 inwardly or toward the right. A pair of screws 220 extend through the am 218 into the plate 75 and a spring finger 221 is v I fixed'to the arm at one end and its free end engages the head of one of the screws 220 so that the arm 217 is held in normal position snugly against the plate 7 5 and spaced apart from the heads of the screws 220. The inner end of the arm 217 is provided with a dog 222 which is in line with the teeth of the back space rack 213. This dog normally clears the rack teeth 13, but by pressing the upper end-of the finger-piece 218 toward the right, the do is depressed into engagement with the Tack spacing rack and the carriage andrack are moved back or toward the right until the lefthandv of the slides 215 engage the pins 214:. During this movement the spacing dog 101 of the escapement passes over one of the teeth of the spacing rack 105,

so that when the back-spacing dog is released the carriage is held against return movement. When the back spacing dog is up released, the spring 216 will move the rack 213 back to the normal position shown in Fig. 8, so that the back-spacing mechanism is ready for the succeeding operation. In this way, the carriage may be moved a letter-space at a time in backward direction or toward the righthand side of the machine.

It should be noted that the parts can be inexpensively formed by suitable dies from sheet steel. It is obvious that changes may be made from the details set forth without departure from the essentials of the invention, and that parts may be taken without its adoption in entirety.

* I claim as my invenion:

1. In a typewriting machine, the combination with a mainframe and a type bar action mounted therein, of a vertically mov able shift frame, a carriage bed mounted on said shift frame, a platen carriage on 35 a ratchet centrally mounted said bed, ribbon? carrying and feeding mechanism mounted on said shift frame, a ribbon vibrator mounted on said shift frame, an escapement including a vertically disposed dog rocker having escapement dogs thereon and pivotally mounted on said shift frame, key-controlled means for vertically moving said shift frame, means controlled by the type bar action for oscillating said dog rocker in the different positions of said shift frame, and devices mounted on'said pivoted dog rocker for operating said ribbon vibrator and said ribbon feed mechanism, substantially as described.

In a typewriting machine, the combination with a main frame and an upwardly and rearwardly striking type bar action mounted thereon, of a vertically movable, case-shift frame, a carriage bed mounted thereon, a platen carriage on said bed, ribbon' spools mounted on said shift frame in front of said carriage bed, feed mechanism for said spools mounted on said shift frame below said carriage bed, a ribbon vibrator pivotally mounted on said shift frame, an escapement including a dog rocker pivotally molmted onsaid shift frame and having escapement dogs thereon, key controlled means for vertically moving said shift frame, a universal bar mounted on. said main frame and arranged to oscillate said pivoted dog rocker in the different positions of said shift frame and separate devices mounted on said pivoted dog rocker for respectively p in said ribbon vibra:

tor and said ribbon feed mechanism, substantially as described. v

In a front strike typewriter, the combination of a vertically movable shift frame,

a carriage bed thereon, a platen carriage on said shift frame, vertical ribbon-spool shafts mounted on said shift frame in front of the end portions of said carriage bed, a horizontal drive shaft mounted on said shift frame below said carriage bed, separate sets of gears for connecting the ends of said drive shaft and the lower ends of said ribbon-spool shafts, said drive shaft being movably mounted on said shifting frame to alternately engage said sets of gears and means for actuating said shaft in the different positions of said shift frame, substantially as described.

4. In a front-strike typewriter, the combination with a vertically shifting frame, a

platen carriage mounted thereon, and verti-' cally disposed spool shafts at the front end portions of said frame, of gears connected to the lower ends of said shaft, a horizontal drive shaft having gears at its ends for driving said spool-shaft gears, a horizontal support for said shaft centrally pivoted to said shifting frame and movable thereon to ;connect said drive shaft to said spool shafts, on said shaft,

tal

nation with a carriage,

a rocker on said shifting frame, pawls on said rocker for operating said ratchet and means for actuating said rocker in the different positions of said shifting frame, substantially as described.

5. In a front-strike typewriter, the combination with a main frame, of a vertically shifting frame comprising uprights and a carriage-bed fixed thereto, ribbon spools mounted on said uprights in front of the end ortions of said carriage bed, a horizonve shaft, sets of gears for connecting said drive shaft and said spool shafts, a swinging support for said shaft centrally pivoted on the under side of said carriage bed for alternately engaging said sets of gears, said support having a projecting finger piece at one end, and means for.actuatmg said shaft in the different positions of said frame, substantially as described.

6. In a front-strike typewriter, the combination with a vertically shifting frame and a platen carriage mounted thereon, an escapement for said platen carriage mounted on said shiftin frame and including a vertically disposed, pivoted dog rocker, spool shafts at the ends of said shlfting frame, a horizontal drive shaft, sets of gears connecting said drive shaft and said spool shafts, a support for said shaft centrally pivoted on sald frame and arranged to alternately engage said sets of gears, a ratchet centrally mounted on said shaft, a pawl on said dog rocker for operatin said ratchet, and means for oscillating saicf dog rocker in the different positions of said frame, substantially as described.

7. In a front strike vibrator, the combia platen thereon, a carriage bed and upwardly and rearwardly striking type bars, of a combined type bar guide and ribbon vibrator pivotally mounted upon the front of said carriage bed below the prmtlng point and having an extension pro ect1ng downwardly and rearwardly from its pivot and a letter-space escapement, including a dog rocker, pivoted on said carriage bed in rear of said vibrator and having a forwardly extending arm arranged to engage said extension and oscillate sald combined type bar guide and ribbon vibrator, substantially as described.

8, In a front-strike typewriter, the combinatlon with the platen, a carriage therefor, and upwardly and rearwardly striking typebars, of a vertically shiftable carriage bed, a combined type-bar guide and ribbon vibrator pivotally mounted upon the front of said carriage bed, an escapement mounted on said carriage bed below the printing LQMEWOI the diflerent vertical positions of said carriage bed, substantially as described.

9. In a front-strike typewriter, the combination with the platen,'carriage and carriage bed, of upwardly and rearwardly striking type bars, a combined type-bar guide and ribbon vibrator pivotally mounted on said carriage bed and extending upwardly and forwardly from its pivot, a ribbon holder longitudinally adjustable on said combined guide and vibrator, and means for oscillating the latter, substantially as described.

10. In a front-strike typewriter, the combination with a platen and upwardly and rearwardly striking type-bars, of oppositely disposed ribbon spools, a ribbon vibrator,

a drive shaft for alternately actuating said spools, an escapement including a pivoted dog rocker, and means on said 'do rocker for operating said shaft and said ri bon vibrator, substantially as described.

111. In a front strike vibrator, the combination with a platen, carriage and carriage bed, of upwardly and rearwardly striking type bars, a slotted type bar idc pivotally mounted on the front of saig oarriage bed below the printing point and extending uphaving ribbon engaging slots in line with said guide prongs and means for oscillatin said guide, substantially as described.

12. In a front strike vibrator, the combination with a platen carriage and a vertically shifting carriage bed of oppositely" disposed ribbon spools mounted in front of the ends of said'carriage bed and vertically shiftable therewith, a ribbon vibrator piv-- otally mounted on the front of said oarriage bed below the printing point," a drive shaft for alternately act-uatin said spools mounted on the under side an adjacent the front of said carriage bed, a dog rocker pivotally mounted on said carriage bed in rear of said shaft and said vibrator, and devices mounted on said dog rocker for respectively operating said shaft and said vibrator, substantially as described.

HUBJER'I K. HENRY.

Witnesses:

J. G. ANDERSON, A. R. CROSMAN.

did